| -rw-r--r-- | fanduct.scad | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fanduct.scad b/fanduct.scad index 746f753..fa14b7a 100644 --- a/fanduct.scad +++ b/fanduct.scad @@ -1,162 +1,163 @@ use <snapper.scad>; extrusion_width=.5; layer_height=.2; // print parameters epsilon=.005; // for finer cuts function hypothenuse(a,b) = sqrt(pow(a,2)+pow(b,2)); silicone_shell = 2; heater_clearance = max( hypothenuse(16/2 +silicone_shell, 20-4.5 +silicone_shell), // E3D v6 hypothenuse(11.5-4.5 +silicone_shell, 15.5 +silicone_shell) // E3D volcano ); fanduct_elevation = 3; // fanduct elevation above nozzle tip fanduct_blowtarget = -2; // what to blow at fanduct_h = 6; // inner height of the duct fanduct_w = 7; // inner width of the duct fanduct_shell=1.2; // shell thickness fanduct_ir = heater_clearance+5; // inner radius jet_angle = 60-2; // angular width of the jet inlet_w = 12.5; // inlet width inlet_h = 17; // inlet height inlet_l = 7; // inlet length of protrusion (or depth of intrusion:)) inlet_away = 15; // how far away inlet is hotend_clearance = heater_clearance; snapper_d = 8; snapper_overlap=0.2; // snip snap smooth_f = 120; type="3jets"; // "3jets" ; // circular|3jets ductshape="square"; // square|round module fanduct(type=type,ductshape=ductshape) { // *** duct is all around! module duct(what) { if(what=="in") { sh = fanduct_w+2*fanduct_shell; sv = fanduct_h+2*fanduct_shell; smax = max(sh,sv); rotate_extrude($fn=smooth_f) if(ductshape=="round") translate([sh/2+fanduct_ir,sv/2]) scale([sh/smax,sv/smax]) circle(d=smax,$fn=4*smax); else if(ductshape=="square") translate([fanduct_ir,0]) square([sh,sv]); }else if(what=="out") { sh = fanduct_w; sv = fanduct_h; smax = max(sh,sv); rotate_extrude($fn=smooth_f) if(ductshape=="round") translate([sh/2+fanduct_shell+fanduct_ir,sv/2+fanduct_shell]) scale([sh/smax,sv/smax]) circle(d=smax,$fn=4*smax); else if(ductshape=="square") translate([fanduct_ir+fanduct_shell,fanduct_shell]) union() { - square([fanduct_w,fanduct_h/2]); - translate([fanduct_w/2,fanduct_h-fanduct_w/2]) - rotate([0,0,90]) circle(d=fanduct_w,$fn=36); + square([sh,sv/2]); + translate([sh/2,sv/2]) + scale([sh/smax,sv/smax]) + circle(d=smax,$fn=36); } } } // *** bumps for easier position adjustments in line with hotend module marks(what) { if(what=="in") { for(y=[-1,1]) hull() for(z=[0,-fanduct_shell-fanduct_h/2]) translate([0,y*(fanduct_ir+fanduct_shell+fanduct_w/2),fanduct_shell*2+fanduct_h+z]) rotate([90,0,0]) { cylinder(r=fanduct_shell,h=fanduct_w,center=true,$fn=30); for(z=[-1,1]) translate([0,0,z*fanduct_w/2]) sphere(r=fanduct_shell,$fn=30); } } } // *** output module output(what,type=type) { module guideline(xyxy) { module pin(xy) { translate([xy[0],xy[1],0]) cylinder(d=2*extrusion_width,h=2*fanduct_shell+inlet_h,$fn=6); } xyxyxy=concat(xyxy,[[0,0]]); for(i=[0:1:len(xyxyxy)-2]) hull() for(j=[i,i+1]) pin(xyxyxy[j]); } module circus(what) { if(what=="in") { difference() { rotate_extrude($fn=smooth_f) polygon([ [0,-fanduct_elevation+fanduct_blowtarget+epsilon], [fanduct_ir+fanduct_shell,fanduct_shell+fanduct_h/2], [fanduct_ir+fanduct_shell+fanduct_w/2,0], [0,-fanduct_elevation+fanduct_blowtarget-epsilon]]); translate([0,0,-1]) cylinder(r=hotend_clearance,h=fanduct_h+2*fanduct_shell+2,$fn=smooth_f); mirror([0,0,1]) translate([0,0,-epsilon]) cylinder(r=fanduct_ir+fanduct_shell+1,h=fanduct_elevation+.1+2); } }else if(what=="out") { rotate_extrude($fn=smooth_f) polygon([ [0,-fanduct_elevation+fanduct_blowtarget+epsilon], [fanduct_ir+fanduct_shell+1,fanduct_h/2], [fanduct_ir+fanduct_w/2+fanduct_shell+1,fanduct_shell], [0,-fanduct_elevation+fanduct_blowtarget-epsilon]]); }else if(what=="airguides") { inr = fanduct_ir+fanduct_shell; our = inr+fanduct_w; union() { for(my=[0,1]) mirror([0,my,0]) { guideline([ [-our,inlet_w/6], [-inr*sin(60),inr*cos(60)] ]); a0=30; as=15; a1=180; for(a=[a0+as:as:a1]) { f = as/(a1-a+as); rotate([0,0,a]) guideline([[-inr-fanduct_w*f,0]]); } guideline([ [-our+fanduct_w*cos(30)*3/4,fanduct_w*sin(30)*3/4], [-inr*cos(10),inr*sin(10)] ]); } }/*union*/ }/*airguides*/ } module jets(what) { od = fanduct_h/2+fanduct_shell; md = fanduct_ir+fanduct_shell+fanduct_w/2; jww = 2*md*sin(jet_angle/2); render(convexity=8) difference() { for(a=[0:120:359]) rotate([0,0,a]) { if(what=="in") { hull() { render(convexity=4) intersection() { translate([md-fanduct_shell-fanduct_w/2,-jww/2,0]) cube(size=[fanduct_shell+fanduct_w/2,jww,od]); duct(what=what); } translate([0,0,-fanduct_elevation]) sphere(r=.5); } }else if(what=="out") { hull() { render(convexity=4) intersection() { translate([md-fanduct_w/2-fanduct_shell,-jww/2+fanduct_shell,fanduct_shell]) cube(size=[fanduct_w/2+fanduct_shell,jww-2*fanduct_shell,od-2*fanduct_shell]); duct(what=what); } |